1963-75 - 3 Inch Wide Springs
C50 through C80 with 3" wide springs101963-75
S50 through S65 School bus chassis with 3" wide springs101963-75
P50101965-66
For C and S - Series before serial no. 140000 Chevrolet; 590000 GMC (mid year 1975)10
True radius, rubber (RB-75) eye leaf bushing springs with low (5" approx.) arch10